diff --git a/news/11241.removal.rst b/news/11241.removal.rst
new file mode 100644
index 00000000000..69fb018660b
--- /dev/null
+++ b/news/11241.removal.rst
@@ -0,0 +1 @@
+Remove ``--use-deprecated=backtrack-on-build-failures``.
diff --git a/src/pip/_internal/cli/cmdoptions.py b/src/pip/_internal/cli/cmdoptions.py
index df5152a78c1..35ae1e68c2e 100644
--- a/src/pip/_internal/cli/cmdoptions.py
+++ b/src/pip/_internal/cli/cmdoptions.py
@@ -1013,7 +1013,6 @@ def check_list_path_option(options: Values) -> None:
default=[],
choices=[
"legacy-resolver",
- "backtrack-on-build-failures",
"html5lib",
],
help=("Enable deprecated functionality, that will be removed in the future."),
diff --git a/src/pip/_internal/cli/req_command.py b/src/pip/_internal/cli/req_command.py
index 6db058869ac..b289426cfe8 100644
--- a/src/pip/_internal/cli/req_command.py
+++ b/src/pip/_internal/cli/req_command.py
@@ -34,7 +34,6 @@
from pip._internal.req.req_install import InstallRequirement
from pip._internal.resolution.base import BaseResolver
from pip._internal.self_outdated_check import pip_self_version_check
-from pip._internal.utils.deprecation import deprecated
from pip._internal.utils.temp_dir import (
TempDirectory,
TempDirectoryTypeRegistry,
@@ -270,31 +269,6 @@ def determine_resolver_variant(options: Values) -> str:
return "2020-resolver"
- @staticmethod
- def determine_build_failure_suppression(options: Values) -> bool:
- """Determines whether build failures should be suppressed and backtracked on."""
- if "backtrack-on-build-failures" not in options.deprecated_features_enabled:
- return False
-
- if "legacy-resolver" in options.deprecated_features_enabled:
- raise CommandError("Cannot backtrack with legacy resolver.")
-
- deprecated(
- reason=(
- "Backtracking on build failures can mask issues related to how "
- "a package generates metadata or builds a wheel. This flag will "
- "be removed in pip 22.2."
- ),
- gone_in=None,
- replacement=(
- "avoiding known-bad versions by explicitly telling pip to ignore them "
- "(either directly as requirements, or via a constraints file)"
- ),
- feature_flag=None,
- issue=10655,
- )
- return True
-
@classmethod
def make_requirement_preparer(
cls,
@@ -371,7 +345,6 @@ def make_resolver(
use_pep517=use_pep517,
config_settings=getattr(options, "config_settings", None),
)
- suppress_build_failures = cls.determine_build_failure_suppression(options)
resolver_variant = cls.determine_resolver_variant(options)
# The long import name and duplicated invocation is needed to convince
# Mypy into correctly typechecking. Otherwise it would complain the
@@ -391,7 +364,6 @@ def make_resolver(
force_reinstall=force_reinstall,
upgrade_strategy=upgrade_strategy,
py_version_info=py_version_info,
- suppress_build_failures=suppress_build_failures,
)
import pip._internal.resolution.legacy.resolver
diff --git a/src/pip/_internal/resolution/resolvelib/factory.py b/src/pip/_internal/resolution/resolvelib/factory.py
index 4569033db0a..d893611d658 100644
--- a/src/pip/_internal/resolution/resolvelib/factory.py
+++ b/src/pip/_internal/resolution/resolvelib/factory.py
@@ -97,7 +97,6 @@ def __init__(
force_reinstall: bool,
ignore_installed: bool,
ignore_requires_python: bool,
- suppress_build_failures: bool,
py_version_info: Optional[Tuple[int, ...]] = None,
) -> None:
self._finder = finder
@@ -108,7 +107,6 @@ def __init__(
self._use_user_site = use_user_site
self._force_reinstall = force_reinstall
self._ignore_requires_python = ignore_requires_python
- self._suppress_build_failures = suppress_build_failures
self._build_failures: Cache[InstallationError] = {}
self._link_candidate_cache: Cache[LinkCandidate] = {}
@@ -201,12 +199,6 @@ def _make_candidate_from_link(
)
self._build_failures[link] = e
return None
- except InstallationSubprocessError as e:
- if not self._suppress_build_failures:
- raise
- logger.warning("Discarding %s due to build failure: %s", link, e)
- self._build_failures[link] = e
- return None
base: BaseCandidate = self._editable_candidate_cache[link]
else:
@@ -228,12 +220,6 @@ def _make_candidate_from_link(
)
self._build_failures[link] = e
return None
- except InstallationSubprocessError as e:
- if not self._suppress_build_failures:
- raise
- logger.warning("Discarding %s due to build failure: %s", link, e)
- self._build_failures[link] = e
- return None
base = self._link_candidate_cache[link]
if not extras:
diff --git a/src/pip/_internal/resolution/resolvelib/resolver.py b/src/pip/_internal/resolution/resolvelib/resolver.py
index 32ef7899ba6..a605d6c254f 100644
--- a/src/pip/_internal/resolution/resolvelib/resolver.py
+++ b/src/pip/_internal/resolution/resolvelib/resolver.py
@@ -47,7 +47,6 @@ def __init__(
ignore_requires_python: bool,
force_reinstall: bool,
upgrade_strategy: str,
- suppress_build_failures: bool,
py_version_info: Optional[Tuple[int, ...]] = None,
):
super().__init__()
@@ -62,7 +61,6 @@ def __init__(
force_reinstall=force_reinstall,
ignore_installed=ignore_installed,
ignore_requires_python=ignore_requires_python,
- suppress_build_failures=suppress_build_failures,
py_version_info=py_version_info,
)
self.ignore_dependencies = ignore_dependencies
diff --git a/tests/functional/test_new_resolver.py b/tests/functional/test_new_resolver.py
index f3acdb9ca9f..efcae29289f 100644
--- a/tests/functional/test_new_resolver.py
+++ b/tests/functional/test_new_resolver.py
@@ -2326,26 +2326,6 @@ def test_new_resolver_do_not_backtrack_on_build_failure(
assert "egg_info" in result.stderr
-def test_new_resolver_flag_permits_backtracking_on_build_failure(
- script: PipTestEnvironment,
-) -> None:
- create_basic_sdist_for_package(script, "pkg1", "2.0", fails_egg_info=True)
- create_basic_wheel_for_package(script, "pkg1", "1.0")
-
- script.pip(
- "install",
- "--use-deprecated=backtrack-on-build-failures",
- "--no-cache-dir",
- "--no-index",
- "--find-links",
- script.scratch_path,
- "pkg1",
- allow_stderr_warning=True,
- )
-
- script.assert_installed(pkg1="1.0")
-
-
def test_new_resolver_works_when_failing_package_builds_are_disallowed(
script: PipTestEnvironment,
) -> None:
diff --git a/tests/unit/resolution_resolvelib/conftest.py b/tests/unit/resolution_resolvelib/conftest.py
index 6cef3c17cff..a8889293bc3 100644
--- a/tests/unit/resolution_resolvelib/conftest.py
+++ b/tests/unit/resolution_resolvelib/conftest.py
@@ -63,7 +63,6 @@ def factory(finder: PackageFinder, preparer: RequirementPreparer) -> Iterator[Fa
force_reinstall=False,
ignore_installed=False,
ignore_requires_python=False,
- suppress_build_failures=False,
py_version_info=None,
)
diff --git a/tests/unit/resolution_resolvelib/test_resolver.py b/tests/unit/resolution_resolvelib/test_resolver.py
index db71f911acd..87c2b5f3533 100644
--- a/tests/unit/resolution_resolvelib/test_resolver.py
+++ b/tests/unit/resolution_resolvelib/test_resolver.py
@@ -29,7 +29,6 @@ def resolver(preparer: RequirementPreparer, finder: PackageFinder) -> Resolver:
ignore_requires_python=False,
force_reinstall=False,
upgrade_strategy="to-satisfy-only",
- suppress_build_failures=False,
)
return resolver